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Circumference of a Circle

A wheel has d...

Question

A wheel has diameter 84 cm. Find how many complete revolutions must it make to cover 792 m.

A

300

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B

250

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C

320

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D

400

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Solution

The correct option is A
300

Circumference $= π \times d = \frac{22}{7} \times 84 = 264 c m$

Total distance = 79200 cm

Number of revolutions = $\frac{79200}{264}$ = 300 revolutions

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